Custom designs are produced to meet customer-specific requirements with the aid of Finite Element Analysis and other leading-edge technology. If needed, these seals will undergo short or long term testing by Trelleborg Sealing Solutions laboratories before volume production.

Automotive Test Rig

A special test stand to simulate factors that have an effect on shock absorbers during operational stress. The installed shock absorber is excited with several superimposed frequencies. The behavior of the seals is investigated for the duration of the running time demanded by the customer.

Technical Data

Rod-Diameter 0 - 50 mm / 0 - 1.96 inch

Rod Velocity 0.002 - 4.0 m/s / 0.0066 - 13.12 ft/s

Test Fluid HLP46 , Automotive Fluids

Stroke Length 200 mm / 7.87 inch

Oil Temperature +25 to +110 °C / +77 to +230 °F

Damper Force 25 kN

Measurable

Leakage

Friction

Pressure

Oil Temperature

Stroke Length

Rod Velocity

Damper Force

Deep Temperature Test

The chamber is designed to hold a complete hydraulic cylinder. Its purpose is to examine the effects of low temperatures on the operating performance of a cylinder and of the installed seals.

Technical Data

Shaft-Diameter 36 and 40 mm / 1.41 and 1.57 inch

Shaft Velocity 0 - 0.2 m/s / 0 - 0.65 ft/s

Test Fluid Aeroshell Fluid 4

Pressure 0 - 15 MPa / 0 - 2175 psi

Oil Temperature -25 °C / -13 °F

Out of Center up to 0.3 mm / 0.0118 inch

Measurable

Leakage

Pressure

Shaft Velocity

Oil Temperature

Number of Cycles

Oil Seal Endurance Test

Test stand with 2 x 4 chambers designed to hold a maximum of 16 radial oil seals. This test stand is intended to examine the operational performance of the ROS under the influence of temperature, rotary frequency and of other parameters, also under inclination / pitch of the complete system etc.

Technical Data

Shaft-Diameter 20- 80 mm / 0.787 - 3.149 inch

Shaft Velocity 8.000 /16.000 rpm

Test Fluid HLP46

Pressure 0 - 5 MPa / 0 - 725 psi

Oil Temperature +25 to +80 (+120) °C / +77 to +176 (+248) °F

Measurable

Leakage

Pressure

Oil Temperature

Surface Temperature

Frequency

Rod Seal Test Rig

Another test stand for the examination of rod seals. There are, however, no permanently mounted test chambers installed within this equipment. The seals can be tested in almost any kind of cylinder provided by customers. The actuation of the testing cylinders is also carried out by means of a centrally arranged common drive cylinder.

Technical Data

Rod-Diameter 17 - 50 mm / 0.669 - 1.968 inch

Rod Velocity 0.001 - 0.4 m/s / 0.003 - 1.312 ft/s

Test Fluid HLP46

Pressure 0 - 20 MPa / 0 - 2900 psi

Stroke Length 0 - 250 mm / 0 - 9.842 inch

Oil Temperature +25 to +80 °C / +77 to +176 °F

Measurable

Leakage

Friction

Pressure

Rod Velocity

Oil Temperature

Stroke Length

Rotary Seal Test Rig

Test stand for the examination of rotary seals. The same test stands are also installed as standard equipment in other Trelleborg Sealing Solutions research laboratories in Northern Europe and the U.S. to make globally standardized uniform testing conditions possible.

Technical Data

Shaft-Diameter 60 - 95 mm / 2.362 - 3.740 inch

Shaft Velocity 0 - 0.5 m/s / 0 - 1.640 ft/s

Test Fluid HLP46

Pressure 0 - 50 MPa / 0 - 7251 psi

Swivel Angle 90 - 360 °

Oil Temperature +25 to +80 (+120) °C / +77 to +176 (+248) °F

Measurable

Leakage

Friction

Pressure

Shaft Velocity

Oil Temperature

Number of Cycles

Frequency

Tensile Test Rig

A general test stand for the determination of either tensile stress values or elongation of test specimens for materials subjected to specific elongation or stress values. This test stand may also be used to determine the frictional forces occurring at the contact surface of seals installed in cylinders (cylinders are not in operation for this test.)

Technical Data

Rod Velocity 0 - 0.1 m/s / 0 - 0.328 ft/s

Pressure 0 - 50 MPa / 0 - 7251 psi

Stroke Length 500 mm / 19.685 inch

Damper Force 10 kN

Measurable

Friction

Stroke Length

Rod Velocity

Wiper Test Rig

Test stand to determine the capability of scrapers to block dust / dirt, that has been applied externally under defined conditions, from infiltrating into a hydraulic system. The foreign particles that have intruded into the system are collected in the plexiglass receptacles which may be seen in the center of the illustration. The oil contained in these receptacles is analyzed / examined for these impurities.

Technical Data

Rod Diameter 0 - 50 mm / 0 - 1.968 inch

Rod Velocity 0 - 0.5 mm/s / 0 - 0.001 ft/s

Test Fluid HLP46 & Arizona Dust

Pressure 0 - 5 MPa / 0 - 725 psi

Stroke Length 200 mm / 7.874 inch

Rod Deflection 0 - 0.5 mm / 0 - 0.0197 inch

Oil Temperature +25 to +50 °C / +77 to +122 °F

Measurable

Size & Amount of Sand Particles

Rod Deflection

Pressure

Polymer Laboratory

Testing and Development

The following images highlight the processes utilized by Trelleborg's polymer laboratory to ensure quality, performance and efficiency within the Polyurethane (PU) sealing solutions field.

Micro-hardness IRHD according to DIN ISO 48

Compatibility with various media according to DIN 53508 and ISO 1817

Thermogravimetric analysis, following VDA 675135

Material development according to customer specification

TR point according to DIN 53545TR10 point according to TBS-00036

Product Development

The products in Trelleborg Sealing Solutions standard range are suitable for a variety of applications. As requirements cannot always be satisfied with existing sealing solutions, our Product Development team can create custom solutions, from a simple sealing element to a multi-component part with integrated features.

Trelleborg can create the solution
A wide variety of materials and a broad range of options in production technology are the basis of Trelleborg Sealing Solutions product development. The interaction of modern development methodology with experience of simulation and trial, lead to the development of specialized custom-made products.

No matter whether durable high-pressure seals or delicate ventilation valves, low-friction shock absorber seals or unyielding dirt scrapers are required for the task at hand, the Trelleborg Sealing Solutions Product Development Division offers special solutions providing the best possible product for the customer.

PU Development

With the opening of the Polyurethane (PU) Laboratory in 2001, Trelleborg Sealing Solutions made clear the importance of this material group, for dynamic sealing technology. Since then, we have been able to increase our efficiency and improve our performance in the field of PU development.

At present, we can offer our customers

The selective combination of specific materials in order to increase the performance of our standard products

Development focused on customer's requirements, such as custom PU formulations

All processes and resources necessary to tackle the development of high-performance materials in our Polyurethane Laboratory:

Chemical processing reactor with the option of regulated temperature control - for use in formation of the pre-polymer

Cross-linking station equipped with a high-speed agitator - For blending of the pre-polymer with the cross-linking agent

Specially designed tools for series-identical fabrication of prototypes and testing specimens used for laboratory investigation

An injection-molding machine which is identical with the machine used in series production featuring additional software options for Quality Assurance and process adaptability surveys.

Highly qualified staff with years of experience

We can produce thermoplastic polyurethanes (TPUs) based on their chemical, physical, tribological and mechanical properties on a semi-industrial scale by creating task-adapted molecular structures.

The three basic components, isocyanate, polyol and cross-linking agent, are carefully varied during chemical synthesis. Additives are also incorporated in some cases.

With these three constituents we can take influence on:

The damping properties

The permanent set

Rigidity

The Young's modulus

Resistance against extrusion

The behavior at high and at low temperatures

Chemical resistance

Abrasion behavior

The formulations and measurement readings of the material tests are precisely recorded. We can, for example, construct stress-elongation-curves derived from the tensile tests by applying our Finite Element Method (FEM) calculation system. We can therefore simulate the sealing behaviour for certain criteria, so that based on predefined piece-geometry, conclusions may be drawn regarding the optimum material.

The future generations of improved TPUs may be typically found in the following application fields:

Seals for rods and pistons used in pneumatics and hydraulics

Scraper elements

Rotary seals

Valves

Machined parts used in engineering, especially with multifunctional feature

PTFE Development

Our Vision
Being the World's best in Polytetrafluoroethylene (PTFE) based materials within our Industry

Our fields of research

Basic PTFE physics

Processing influence

Other processing activities

Production methods

Standardization of PTFE materials

Development of new materials and improvement of existing PTFE based materials

Our facilities

Material laboratory

Instruments for thermal analysis

Test bed

Material Laboratory

These are some of the instruments used for testing the latest developments with Polytetrafluoroethylene (PTFE) at Trelleborg Sealing Solutions: